CONTENTS OF VOL. XXII. SIXTH SERIES. Vll 



Page 



Mr. S. G. Lusby on the Mobility of the Positive Ton in 



Flames ' ' 5 



Mr. G-. \V r . Todd on the Mobility of Positive Ions produced 

 from Heated Aluminium Phosphate in Gases at Low 



Pressures • • '91 



Mr. H. Carter on the Radioactive Properties of High 



Temperature Flames 805 



Prof. J. S. Townsend on the Mode of Conduction in Gases. . 816 

 Notices respecting New Books : — 



Gesammelte Abhandlungen von Friedrich Kohlrauseh. . 819 

 Dr. G. T. Walker's Outlines of the Theory of Electro- 

 magnetism 819 



Proceedings of the Geological Society : — 



Dr. J. D. Falconer on the Geology of Northern Nigeria. 820 



NUMBER CXXXII.— DECEMBER. 



Messrs. S. Kinoshita, S. Nishikawa, and S. Ono on the 

 Amount of the Radioactive Products present in the Atmo- 

 sphere : . . . 821 



Dr. R. W. Boyle on the Solubility of Radium Emanation : 



Application of Henry's Law at Low Partial Pressures .... 840 

 Mr. Otto Stuhlmann, Jr., on the Difference in the Photoelectric 



Effect caused by Incident and Emergent Light. — Part II. . 854 

 Dr. J. W. Nicholson on a Structural Theory of the Chemical 



Elements '. 864 



Prof. E. P. Adams on Electrostriction b$9 



Mr. C. W. Heaps on the Effect of Magnetic Fields on Metallic 



Resistance. (Plate XVI.) 900 



Prof. H. A. Bnmstead on the Emission of Electrons by Metals 



under the Influence of Alpha Rays 907 



Mr. R. Rossi on a Relation between the Atomic Volumes 



and the Spectra of Elements 922 



Prof. Chas. T. Knipp : Rays of Positive Electricity from the 



"Wehnelt Cathode. (Plate XVII.) ". 926 



Mr. S. A. Shorter on ihe Application of the Theory of 

 Chemical Potential to the Thernioclvnamieal Theorv of 



Solutions.— Part I ] . . . 933 



Mr. G. H. Livens on some Further Problems connected with 



the Motion of Charged Spheres 943 



Dr. Henry Wilde on the Periodic Times of Saturn's Rings . . 949 

 Notices respecting New Books : — 



Dr. E. T. Whittaker's History of the Theories of JEther 

 and Electricity from the Age of Descartes to the close 



of the Nineteenth Century 951 



Proceedings of the Geological Society : — 



Mr. R. J. Lechmere Guppy on the Geology of Antigua 



and other West Indian Islands 953 



Index , 954 



